Con-sti-tute, gosod; cyfansoddi; sefydlu
Con-struc-tion, adail; cyfansoddiad; cystrawen
Con-sump-tion, traul; darfodedigaeth
Con-ta-gious, heintus; adwythig
Con-tem-plate, myfyrio, ymsynied; bwriadu
Con-tend-ing, ymryson; gwrthwynebol
Con-ten-tion, ymryson, ymrafael, anghydfod
Con-ten-tious, ymrysongar, amrafaelgar
Con-tent-ment, boddlonrwydd, boddhâd
Con-ti-nence, diweirdeb; ymattal